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7747 Cool Compensation Spark Table

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Old Jul 11, 2004 | 02:52 AM
  #1  
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7747 Cool Compensation Spark Table

Guys,
This 3d table is displayed in TC as being 5-115degC x 0-40kPa MAP.
What happens from 40-100kPa?
I'm guessing that it uses the values in the 40 MAP column at 40-100kPa MAP.
Can anyone confirm this for me?
I've burned few different eproms to experiment with this, and it looks to be the case, but its difficult to do repeat testing because it the coolant heats up too fast to get many tests in! ;-)
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Old Jul 11, 2004 | 06:24 AM
  #2  
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Re: 7747 Cool Compensation Spark Table

Originally posted by ben73
Guys,
This 3d table is displayed in TC as being 5-115degC x 0-40kPa MAP.
What happens from 40-100kPa?
I'm guessing that it uses the values in the 40 MAP column at 40-100kPa MAP.
Can anyone confirm this for me?
I've burned few different eproms to experiment with this, and it looks to be the case, but its difficult to do repeat testing because it the coolant heats up too fast to get many tests in! ;-)
The columns are 40 to 0 KPa of vacuum, not pressure. If barometric were 100 KPa then the table is from 60 KPA to 100 KPa of MAP.

RBob.
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Old Jul 11, 2004 | 06:41 AM
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From: Australia
ahhhhhhh, now it makes sense! Thanks!
I have changed my .ecu file to reflect this.
I thought that all references to Manifold Pressure were measured in Kpa absolute, thats why we call it m'A'p.. ;-)
There's always an exception to the rule huh!
So when the pressure moves beyond the boundaries of the table, does it just use the values in that 1st column (40kPa vac / 60 kpaA) ??
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Old Jul 11, 2004 | 07:22 AM
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Re: 7747 Cool Compensation Spark Table

Originally posted by ben73
I've burned few different eproms to experiment with this, and it looks to be the case, but its difficult to do repeat testing because it the coolant heats up too fast to get many tests in! ;-)
With an ecm bench that'd have been a 3 min., ordeal to figure out.
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